Modified the Linux build system so that makefiles are now outside the source tree

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1477 4e206d99-4929-0410-ac5d-dfc041789085

build/make/Makefile.system

@@ -0,0 +1,28 @@
+SRC = $(wildcard $(SRCROOT)/System/*.cpp $(SRCROOT)/System/Unix/*.cpp)
+OBJ = $(SRC:.cpp=.o)
+
+LIB         = libsfml-system.so
+LIBNAME     = $(LIB).$(VERSION)
+FULLLIBNAME = $(LIBPATH)/$(LIBNAME)
+LINK        = $(LN) $(LNFLAGS) $(LIBNAME) $(DESTLIBDIR)/$(LIB)
+
+all: $(LIB)
+
+libsfml-system.so: $(OBJ)
+	$(CPP) $(LDFLAGS) -Wl,-soname,$(LIBNAME) -o $(FULLLIBNAME) $(OBJ) -lpthread
+
+$(OBJ): %.o: %.cpp
+	$(CPP) -o $@ -c $< $(CFLAGS)
+
+.PHONY: clean mrproper
+
+clean:
+	rm -rf $(OBJ)
+
+mrproper: clean
+	rm -rf $(FULLLIBNAME)
+
+install:
+	objcopy --only-keep-debug $(FULLLIBNAME) $(DESTDBGDIR)/$(LIBNAME)
+	objcopy --strip-unneeded  $(FULLLIBNAME) $(DESTLIBDIR)/$(LIBNAME)
+	$(LINK)